 /*******************************************************************************
  * Copyright (c) 2006, 2007 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  * IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.core.internal.expressions.propertytester;

 import org.eclipse.core.runtime.IProduct;
 import org.eclipse.core.runtime.Platform;

 import org.eclipse.core.expressions.PropertyTester;

 /**
  * A property tester for testing platform properties. Can test whether or
  * not a given bundle is installed in the running environment, as well as
  * the id of the currently active product.
  *
  * For example:
  * <test property="org.eclipse.core.runtime.product" args="org.eclipse.sdk.ide"/>
  * <test property="org.eclipse.core.runtime.isBundleInstalled" args="org.eclipse.core.expressions"/>
  */
 public class PlatformPropertyTester extends PropertyTester {
     
     private static final String PROPERTY_PRODUCT = "product"; //$NON-NLS-1$
 private static final String PROPERTY_IS_BUNDLE_INSTALLED = "isBundleInstalled"; //$NON-NLS-1$

     /* (non-Javadoc)
      * @see org.eclipse.core.expressions.IPropertyTester#test(java.lang.Object, java.lang.String, java.lang.Object[], java.lang.Object)
      */
     public boolean test(Object receiver, String property, Object [] args, Object expectedValue) {
         if (Platform.class.equals(receiver)) {
             if (PROPERTY_PRODUCT.equals(property)) {
                 IProduct product= Platform.getProduct();
                 if (product != null) {
                     return product.getId().equals(expectedValue);
                 }
                 return false;
             } else if (PROPERTY_IS_BUNDLE_INSTALLED.equals(property) && args.length >= 1 && args[0] instanceof String ) {
                 return Platform.getBundle((String )args[0]) != null;
             }
         }
         return false;
     }
 }

